Cooling jacket of internal-combustion motors



Oct. 15, 1929. J. DE JONG 1,731,838

COOLING JACKET OF INTERNAL COMBUSTIUN HOTORS Filed Dec. 2. 1926 z Shoets-Sfieet 1 lily 7.

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l 2 I p I Oct. 15, 1929. .1. 'DE JONG 1,731,833

COOLING JACKET OF INTERNAL COMBUSTION IOTOHS Filed Dec. 2. 1926 2 Shuts-Cheat 2 Patented Oct. 15, 1929 PATENT OFFICE JACQUEEt DE JONG, 613

[all YERP, BEL

COOLING JACKET 01E INTEIlNhIr-GUIVEBUSTION MOTOR/E:

Application filed December 2, 1928, Seria1 No.

This invention relates to internal-combustion motors, the cylinders of which have detachable heads, and more particularly to sleeve-valve motors in which the distribution is eltected by one or two concentric sleeves sliding between the inner wall of the cylinder and that of the head.

The arrangement hereinafter described may also be applied to motors with slide valves in the form of segments.

With the present construction of these motors, there are independent heads secured to a single cylinder block, with a water-jacket covering the heads. The jacket acts as a collector and ensures the return of the cooling water to the radiator.

The joint which ensures a tight joint between the head and the cylinder, is therefore constantly in contact with the cooling water.

This joint, it not made from first-class materials and with the desired care, is liable to be a source of serious inconvenience to the motor, as the sleeve-valves are liable to become affected owing; to water leaking through.

The studs and nuts for securing the head, are situated in the water-jacket and have to be made of material preventing oxidation; it this precaution is omitted, it will be impossible to dismantle the motor after the lapse of a certain time. The cooling of the heads is effected in this arrangement by thermo-siphoning, the heads being arranged in the water-jacket. The system is admittedly insufficient for high compression engines.

The present invention has for its ob ect to remedy the defects hereinbetore set forth, and comprises a forced water circulation for cooling the heads.

The accompanying drawings show by way of example two constructions according to the invention.

The first relates to a V-engine with two series of cylinders, in which the two cylinder 5 blocks are inclined at a certain angle to each other.

Figure 1 is a section through the axis of the cylinder block.

Figure 2 a section trough the axis A-B '50 of Fig. 1 of the cooling water collector.

152,265, and in Eelgium December 253, 19325.

Figure 3 is a section on the line CD E-F of Fig. 2.

Figure 4L- a section on the line G-H of Fig. 2 showing a detail of the water outlet between the cylinder and the head.

Figure 5 is a section of the cylinders of a modified term of the invention through the axis AB of Figure 6.

Figure 6 is a section on the line C D of Figure 7 showing the inlet and the outlet for cooling, water for the head.

Figure 7 is a section on the line E F o1 l ig 'ure 6 showing the Water outlet piping and the arrangement of the heads.

In the first construction, the cylinder block is closed the top and has a machined face to which the heads are secured. The cylinder block jacket does not comprise any water outlets other than the holes 2 and 2 The cylinder blocks beinginclined, the holes 2 provided in the lowest portion of the jackets, will be those mainly used for the escape of water.

The water after having cooled the cylinder 1, passes through the opening 2 and the conduit 3, towards he head a. This conduit is arranged tangentially to the water-jacket of the head, and the water has thus the tendency to assume a rotary movement which, in

combination with the inclined position the a head, assists a uniform cooling of the latter. The head jackets are provided with two ribs 5 which, besides strengtheniim; them, play a part in the cooling of the head; these ribs do not extend throughout the whole height, but are broken at the bottom of the water-jacket of the head.

The current of water escaping from the conduit 3, impinges against these ribs and is thus directed towards the lower part of: the head-jacket. This portion is therefore energetically cooled, as is also the seating for the sparking plugs. This cooling of the plugs is a striking advantage with existing high compression engines, in the working of which serious trouble is experienced on account of the excessive heating of the plugs.

The water, after having cooled the heads, passes into a collector 6 flattened so as to reduce the space occupied by the same; this collector connects the head jackets together. From the collector 6 the water returns to the radiator trough the opening 7.

To facilitate the circulation of water in the collector 6, and to avoid formation of steam pockets which would render any uniform cooling of the various heads impossible, a pipe or conduit 8parallel to thecollector Gandcast with the same, is provided. Opposite each head there is a water outlet 9 of relatively small bore, which gives a direct passage to the outlet 7. through the conduit 8. The holes 2 of the cylinder jacket are also in communication with the conduit 8.

The holes 2 and 2 have calibrated nipples .by which, when tuning up the engine the temperature of the head jackets may be regulated exactly by modifying the supply of water to the latter.

Rubber oints or packing rings are provided at the water inlets and outlets.

It will be seen that, with the arrangement just described, the joint of the head 10 is completely isolated from the cooling water, the studs and nuts for fixing the heads being no longer 7 in the water-jacket. The wall 11 which completes the collector 6, is merely a covering intended to improve the outer appearance of the top of the cylinder. At its base 12 which does not form a joint, some clearance is intentionally left which enables the slightest leak of water or gas to be discov- .ered as soon asit takes place.

The second construction relates to a motor withcylinders arranged vertically in line.

In the second construction shown in Figures 5, 6 and ,7, thewater escapes from the jacket of the cylinder 1 through the holes 2 ofwhich two are provided per head in the construction shown by way of example. From the calibrated holes 2, the water passes through the conduits 3 into the water-jacket of the head 4.

A water collector 6 connects the heads together,and a circular washer 13 of sheet metal cuts off any direct communication between the head-jacket and collector, except that provided for the purpose. Two ribs 5 divide the water-jacket of the head'into two parts and leave a passage only at the bottom where they are broken. 7 V

The water escaping from the conduits 3 beingunableto rise, is therefore forced to descend in order to pass under the ribs 5, cooling the sparkingplugs and the bottom of the head efiiciently. Subsequently the ater passes to the collector 6 through holes 14 provided in the plate13, at the side opposite to that of the admission. The joint of the head remains isolated from the cooling water. v It will be seen that in this construction, the whole cooling water of the cylinders passes through the head-jackets. The velocity of assage may be regulated to a certain extent I y the number and dimensions of the outlet holes 14. If the cooling of the head is found too efficient, a direct passage may be provided, as in the first construction, from the cylinder 1 to the collector 6 by perforating the plate 13 opposite the conduits 3.

What I claim is:

1. In an internal combustion engine, a cylinder having a hollow wall closed at top and bottom and providing a water jacket; a head in the cylinder and also having a hollow wall forming a water acket; a partition wall extending across the said water jacket of the cylinder head and terminating short of the bottom of said water jacket so that said wall forms a baflle to direct a water current to the bottom of said water jacket and also forms a radiating fin, and a cover for said cylinder and head; said cover having a collecting chamber therein and with which the water jackets of the cylinder wall and head communicate.

2. In an internal combustion engine as claimed in claim 1, the provision of a water inlet duct connecting the cylinder "1 ll water jacket with the cylinder head jacket and the collecting chamber and the further provision of a calibrating nipple in said duct.

3. In an internal combustion engine as claimed in claim 1, the provision of a water inlet duct connecting the cylinder wall water jacket with the cylinder head jacket and the collecting chamber and the further provision of a partition wall in said collecting chamber terminating short of the ends there of and forming a water channel on one side of said collecting chamber and extending from end to end thereof.

4. In an internal combustion engine, a cylinder having a hollow wall closed at top and bottom and providing a water acket a head in the cylinder and also having a hollow wall forming a water acket; and a cover for said cylinder and head and having a collecting chamber therein, the water j aeket of said cylinder head communicating with said collecting chamber and said cylinder head water jacket and said collecting chamber having a common inlet duct communicating with the water jacket of the cylinder wall, and a calibrating nipple in said duct.

5. An internal combustion engine as claimed in claim 1, in which the cylinder head is secured to the cylinder independently of the cover.

In witness whereof I afiix my signature.

JACQUES nu JONG. 

